So if dryness (read: flaking, tightness, dullness) is an occasional occurrence, you might be experiencing skin dehydration, though it can be pretty confusing to determine which one is which—here’s one way to tell. Now, let’s say your pinch reveals fine lines (aka, dehydration). What can you do besides drink enough water? Here are a few rapid-fire tips: To tend to your collagen production, you may consider adding a hydrolyzed collagen supplement to your routine—here’s a curated list of A+ options, straight from a nutrition Ph.D.